ATM pin holes

[astillma@nit.AirTouch.COM (Anthony Stillman)]

As an aside to the test thread.

A good way to make pin holes is:

1) Use brass shim stock
2) Dent, do not poke a hole, but dent the brass with a needle or pin
3) Where the dent in the metal projects, lighly sand with fine emery cloth
    your mate's best nail file will work, if you don't get caught
4) Sand to the desired size

This works well. Makes a nice round hole (if you use fine sand paper) and 
the size of the hole can be adjusted quite accurately, though a microscope 
with a reticle helps here.



Anthony
Next, how to make your own pitch lap mold.